Java FileOutputStream Write saveFile(String filename, byte[] content)

Description

save File

License

Apache License

Declaration

public static void saveFile(String filename, byte[] content) throws IOException 

Method Source Code

//package com.java2s;
/* /*w  w  w  .  j  a  v  a2s  .com*/
 * Licensed to the soi-toolkit project under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The soi-toolkit project licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class Main {
    public static void saveFile(String filename, byte[] content) throws IOException {
        saveFile(filename, new ByteArrayInputStream(content));
    }

    public static void saveFile(String filename, InputStream inputStream) throws IOException {
        File file = createFileWithUniqueName(filename);
        copy(inputStream, file);
        System.err.println("### Wrote attachement to file: " + file.getAbsolutePath());
    }

    public static File createFileWithUniqueName(String orgFilename) throws IOException {

        File file = new File(orgFilename);

        // Bail out if no conflict, the a file with this filename doesn't exist already
        if (!file.exists())
            return file;

        // Find out a unique name...
        int fileTypeIdx = orgFilename.lastIndexOf('.');
        String filename = orgFilename;
        String fileType = "";
        if (fileTypeIdx >= 0) {
            fileType = filename.substring(fileTypeIdx); // Let the fileType include the leading '.'
            filename = filename.substring(0, fileTypeIdx);
        }
        for (int i = 0; file.exists(); i++) {

            file = new File(filename + '-' + i + fileType);
        }

        return file;
    }

    public static byte[] copy(InputStream src) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        copy(src, baos);
        return baos.toByteArray();
    }

    public static void copy(InputStream src, File dst) throws IOException {
        copy(src, new FileOutputStream(dst));
    }

    public static void copy(InputStream src, OutputStream dst) throws IOException {

        try {
            // Transfer bytes from in to out
            byte[] buf = new byte[1024];
            int len;
            while ((len = src.read(buf)) > 0) {
                dst.write(buf, 0, len);
            }
        } finally {
            if (src != null) {
                src.close();
            }
            if (dst != null) {
                dst.flush();
                dst.close();
            }
        }
    }
}

Related

1. saveFile(String desEncryptTempFile, byte[] text)
2. saveFile(String destinationFile, String contents)
3. saveFile(String dir, String fileName, String data)
4. saveFile(String file, String text)
5. saveFile(String fileName, byte[] bytes)
6. saveFile(String fileName, byte[] data)
7. saveFile(String fileName, InputStream stream)
8. saveFile(String filename, String content)
9. saveFile(String fileName, String contents)